Fluid tight container



Sept. 12, 1961 J, ANDELIN 2,999,387

FLUID TIGHT CONTAINER Filed Feb. 16, 1959 2 Sheets-Sheet 1 INVENTOR.J0///V AIVDEZ //V Sept. 12, 1961 J. ANDELIN FLUID TIGHT'CONTAINER 2Sheets-Sheet 2 Filed Feb. 16, 1959 dew JM 9 M United States Patent FiledFeb. 16, 1959 Ser. No. 793,319

2 Claims. (Cl. 73-427) The present invention relates'to containers foracid, caustic, fertilizer, milk, body fluids such as blood, blood plasmaand urine among numerous other liquids or powders with which it may becharged.

It is among the objects of the invention to provide a liquid tightcontainer for the above purposes which avoids the use of glass, metal,rubber or molded plastic for the body of the container that may be ofany size from one pint or less to or gallons or more, which is in theform of a sac or bag so that when empty it occupies but a small fractionof the space taken up by containers of glass, metal, vulcanite or thelike, which is relatively inexpensive both in material and labor, andwhich is translucent or transparent and thus admits readily of readingthe volumetric contents of the container when suspended by a hang cord.

In the accompanying drawings in which are shown one or more of variouspossible embodiments of the several features of the invention,

FIG. 1 is a front elevation with parts broken away showing the sac insuspended relation;

FIG. 2 is a side elevation of the sac shown in 'FIG. 1;

FIG. 3 is a view in longitudinal cross section on a larger scale takenon line 33 of FIG. 2;

FIG. 4 is a transverse sectional view on a larger scale taken on line4-4 of FIG. 2, and

FIG. 5 is a dropped perspective view showing the sac, its neck and coverin relation aligned before assembly.

Referring now to the drawings, the sac is desirably made of a thinplastic film stock preferably in the order of 6 mm. in thickness, whichwhile preferably of polyethylene, may be made of other liquid tight filmplastic such as vinyl resin or cellophane.

According to the invention, the sac preferably comprises a flat frontface 10 and an identical flat rear face 11, preferably each rectangularin shape and is provided with a relatively rigid neck 12 firmly bondedto the sac. The neck has closure means adapted to be opened for fillingwith or removal of liquid or powder, such means being desirably a cover13 that may be removably screwed upon the threads 14 molded in the neckmember 12.

The neck member 12 is preferably provided with an integral peripheraloutstanding fiat flange 15 at its bottom which is permanently attachedto the sac as a unitary part thereof. Preferably the neck member isbonded to the sac about a circular opening .16 therein, the uprightdiameter of which opening extends along the connecting edge 17 betweenthe front face 10 and the rear face 11. Thus, half of the circularaperture extends as a scallop 18 from the edge 17 in the front face andthe other half extends as a similar scallop 19 in the rear face 11.

Desirably the film stock of the sac is formed from flat tube stock, heatbonded as at 21 along the bottom of the sac and also heat bonded as at22 along the top after the assembly has otherwise been completed ashereinafter set forth.

In the preferred embodiment the neck member is made of the same moldedplastic as the sac but is desirably injection molded and is of thicknessin the order of inches. Preferably the base of the cover has a pair oflateral narrow upstanding ribs 26 to enhance its stiflness. Thus, theneck base flange 15 and its extension tongue of the flattened outcircular 23 which extends upwardly from and is.'unitary and coplanarwith the flange'15may readily be heat bonded to the sac as bestshown inFIG. 3. Thus, it will be seen that the base rim 15 and extension tongue23 of the neck member become securely bonded about the rim aperture 16in the plastic film sac.

Moreover, the end of the upper edge of the sac maybe and preferably isheat bonded as at 25 to the face ofthe extension tongue 23. After theassembly has been completed to the extent noted, by pressing the heatedneck base 15, 23 against a reaction plate (not shown) intro-. duced intothe bag to flatten out the film material 10, -11 about the circularaperture 16 so that the aperture extends in a single plane, then uponwithdrawal of the reaction plate the upper edge of the bag may be heatsealed at 22 to complete the assembly and the right end portion of saidheat sealed seam 22 is thenheat sealed at 25 to the extension tongue 23of the neck base.

Desirably the front face of the sac has imprinted thereon scale markings27 to indicate the volumetric contents since the film of polyethylene,vinyl resin, cellophane or the like is suificiently translucent if notentirely transparent to view the level of the liquid or powder contentstherein.

For facility in reading the contents, the extension tongue 23 on thebase of the neck has a small aperture 28 therethrough for the hang cord29 by which the sac may be suspended with its oblique scale 27 uprightand its scale markings 30 horizontal.

It will be seen that the sac as above shown and described is continuousabout its entire periphery, the lateral edges 17 preferably integrallyconnecting the front and the rear face 10 and 11 and the lower and upperedges of the sac being heat sealed as at 21 and 22, re spectively. Onlythe neck member 12 and the associated aperture 16 afford access to thesac, and the neck member is sealed by the cover 13.

It will be seen that the neck member being applied as shown anddescribed about the extended flattened aperture 16 across the edge 17 ofthe sac, the two sides of the sac become spaced from each other at theregion of said neck member 12, so that there is no difficulty in fillingthe liquid or powder into the sac through the neck. Were the neck memberlocated in one of the faces between the edges 17, the two componentfaces of the sac might be in close contact with each other, with thepossibility of the liquid spilling over the rim of the neck memberinstead of entering the sac.

Liquid or powder may readily be discharged from the sac or bag asrequired by removing the cap 13 from the neck member 12 and pouring thecontents or part of the same through the neck member, whereupon the capmay be reapplied to preserve the contents.

The sac affords a tight seal for the liquid or powder contents andminimizes the access of air and dust thereto so that the contents arekept in sterile condition.

The container, sac or bag is of such low cost that for most purposes itmay be discarded instead of being returned to the supplier. However,where occasion arises to return the empty sac the shipping volume is buta small fraction of that incurred with glass or metal containers and thelikelihood of breakage or distortion is at a minimum.

It will, of course, be understood that while it is preferred to make thesac or bag and the neck member of the same thermoplastic resin for easeof heat and pressure bonding, the invention is not so limited, becausethe neck member could be made of glass, metal, vulcanite or the like andcould be bonded to the plastic film sac or bag by a separate adhesive.

As changes could be made in the above construction,

r. 1C6 Pat ented Sept. 12, 1961-,

and different embodiments of this invention could be made withoutdeparting from the scope of the claims, it is intended that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

Having. thus described my invention, what I claim asnew and desire tosecure by Letters Patent of the United States is:

l. A fluid tight container comprising a pair of substantially identicalopposed'rectangular front and back walls of flexible thermoplastic filmmaterial closed alongone side and along the top and bottom thereof andpartially closed along the other side thereof except for a circularopening atthetop of such other side, said opening extending from itsupright diameter along opposite walls of the container, and a rigidtubular neck member of molded plastic provided with an integralperipheral flange, said flange being heat bonded to said front and backwalls adjacent said circular opening whereby to incilitate theintroduction to and discharge from said container through said neckmember of liquids and particulate solids, said neck member having aremovable cover '4 r for sealing said container and said flange portionof said neck member including an extension tongue directed -upwardly-frorn said member in the plane of said flange beyond the top ofsaid container and to which the upper corner of said container is heatbonded.

2. A fluid tight container as claimed in claim 1 in which the extensiontongue has an aperture therethrough for a hang cord and in which thefront wall of the container has oblique lines of volumetric scalemarkings which extend horizontally when the charged container issuspended from said hang oordi References Cited in the file of thispatent UNITED STATES PATENTS Smith June 23, 1953

